Treatment and Reuse of Process Water in Pulp and Paper Industry, Steps Towards Effluent Free Operation, 1996 Minimum Effluent Mills Symposium Proceedings
Göran Lindholm and Esko Jantunen
PI-Consulting Ltd
In the processing of any fibrous raw material used in the production of paper and board, a wide variety of dissolved and dispersed substances are released into the processwater. This paper discusses the possibilities of removing a majority of these substances in an economically effective way in order to produce water that can replace the use of fresh water without endangering production efficiency or product quality. The proposed solution consists of biological water-treatment in combination with countercurrent water-fiber flow and total removal of suspended solids. The case discussed is the production of wood containing paper, but the principle is applicable to any product, process and raw material combination in the production of paper and board...